A synchronous rectification MOS drive circuit

Abstract

The invention relates to the technical field of synchronous rectification MOS driving, and discloses a synchronous rectification MOS driving circuit, comprising a control mechanism, a casing is arranged on the outer side of the control mechanism, a driving chip is arranged inside the casing, a shielding mechanism is arranged on the outer side of the driving chip, a transmission sleeve drives a supercharging plate to rotate and stir the cooling water added before the work when rotating, the cooling water generates centrifugal force in the process of rotation of the bottom of the heat dissipation blade, the centrifugal force of the cooling water is toward the side wall of the heat dissipation blade, the pressure of the cooling water toward the first water outlet hole opened on the lower side of the heat dissipation blade is increased and stable, the stable water pressure ensures the stable operation of the cooling mechanism, the stable pressure of the coolant at the first water outlet hole can provide a stable atomized water output to ensure the reliability and stability of the system, the cooling water can be stably consumed, and the use time of the cooling water in the heat dissipation blade can also be obtained, and the cooling water is added regularly to avoid the cooling water being consumed and affecting the heat dissipation effect.

Description

Technical Field

[0001] The invention relates to the technical field of synchronous rectification MOS driving, in particular to a synchronous rectification MOS driving circuit. Background Art

[0002] Synchronous rectification MOS driver is a circuit used in switching power supply or DC-DC converter to control the conduction and cutoff of synchronous rectification MOS tube. It is mainly used to replace traditional diode rectification and improve energy conversion efficiency. Diodes are used as rectifiers. Diodes have a high forward voltage drop, which will cause energy loss. Synchronous rectification MOS tubes can be used to replace diodes. MOS tubes can turn on or off the load current according to the polarity of the input voltage. When the input voltage is positive, the drive circuit will turn on the synchronous rectification MOS tube to allow the load current to flow to the load. When the input voltage is negative, the drive circuit will turn off the synchronous rectification MOS tube to prevent the load current from flowing and realize the rectification function. The rectification MOS driver usually consists of a controller and a drive circuit. The controller is responsible for detecting the polarity of the input voltage and controlling the output signal of the drive circuit. The drive circuit receives the signal of the controller and converts it into appropriate voltage and current to drive the synchronous rectification.

[0003] The temperature of the synchronous rectification MOS driver circuit will rise under high-power applications. High current and high-frequency operations will cause the circuit components and drivers to quickly generate a large amount of heat. The existing ordinary air cooling cannot quickly remove the heat, resulting in the inability to effectively reduce the temperature of the circuit components. In high-power applications, the high temperature of the MOS driver may shorten the life of the components and increase the risk of failure. Long-term high temperature conditions may cause component failure or reduce its performance and reliability. The internal resistance of the MOS driver will increase with the increase in temperature, resulting in power loss and a decrease in the overall efficiency of the system. High temperature environments are prone to voltage drift, which will affect the accuracy and stability of the rectification MOS driver and cause output voltage offset or fluctuation.

[0004] The high-speed switching operation of the MOS tube in the synchronous rectification MOS drive circuit will cause electromagnetic interference. The rapid current and voltage changes will generate large electromagnetic radiation, which will interfere with the surrounding electronic equipment and systems, affecting their normal operation. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a synchronous rectification MOS drive circuit, which has the advantages of shielding interference and reducing temperature.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A synchronous rectification MOS driving circuit comprises a control mechanism, a housing is arranged outside the control mechanism, a driving chip is arranged inside the housing, a MOS tube circuit is arranged inside the driving chip, a shielding mechanism is arranged outside the driving chip, an atomizing mechanism is arranged inside the shielding mechanism, and a cooling mechanism is arranged in the middle of the shielding mechanism;

[0008] The shielding mechanism is used to shield the electromagnetic interference caused by the driver chip;

[0009] The atomizing mechanism comprises a driving motor, the driving motor is used to provide power, and the atomizing mechanism is used to atomize water;

[0010] The cooling mechanism is used to cool the driver chip.

[0011] Preferably, the shielding mechanism includes a shielding cover fixed to the outside of the driving chip, the top of the shielding cover is fixedly connected to a heat dissipation pipe, the top of the shielding cover is fixedly connected to a plurality of heat-conducting heat dissipation rods, the side of the heat dissipation pipe away from the shielding cover is fixedly connected to a fan casing, and the inner side of the top of the fan casing is fixedly connected to a motor support frame.

[0012] Preferably, the atomization mechanism also includes a driving shaft rotatably connected to the bottom of the driving motor, the bottom of the driving motor is fixedly connected to two support columns, the middle of the support columns is fixedly connected to a transition plate, the driving shaft is not in contact with the transition plate, and the side of the driving motor away from the driving shaft is fixed on the motor support frame.

[0013] Preferably, the lower middle portion of the drive shaft is fixedly connected with a heat dissipation blade, the middle portion of the heat dissipation blade is fixedly connected with a liquid upper baffle, the middle portion of the liquid upper baffle is movably connected with a water adding piston, and the liquid upper baffle rotates on the outer side of the transition plate.

[0014] Preferably, one end of the support column away from the driving shaft is fixedly connected to an L fixed bracket, the middle part of the driving shaft is fixedly connected to a first driving gear, a side of the first driving gear away from the liquid upper baffle is meshedly connected to a changing transition gear, the changing transition gear rotates in the middle part of the L fixed bracket, and one end of the changing transition gear away from the first driving gear is meshedly connected to a reverse driven gear.

[0015] Preferably, a side of the reverse driven gear away from the direction-changing transition gear is fixedly connected to a transmission sleeve, a side of an end of the transmission sleeve away from the reverse driven gear is fixedly connected to a plurality of boosting rods, an end of the boosting rod away from the transmission sleeve is fixedly connected to a boosting plate, and a first water outlet hole is provided on the bottom side of the heat dissipation blade.

[0016] Preferably, the cooling mechanism includes a second driving gear fixedly connected to the bottom of the driving shaft, the side of the second driving gear is meshingly connected to a plurality of reduction gears, the middle of the reduction gear is rotatably connected to a gear positioning rod, and the bottom of the gear positioning rod is fixedly connected to a support seat.

[0017] Preferably, one end of the gear positioning rod away from the atomizing disk is fixedly connected to a support seat, and the bottom of the support seat is fixedly connected to a positioning column, and the positioning column rotates in the middle of the heat-conducting and heat-dissipating rod.

[0018] Preferably, a second water outlet hole is opened on the top side of the atomizing disk, and the first water outlet hole and the second water outlet hole have the same hole diameter.

[0019] Beneficial effects of the present invention:

[0020] 1. The synchronous rectification MOS driving circuit drives the boost plate to rotate and stir the cooling water added before the work through the transmission sleeve when rotating. The cooling water generates centrifugal force during the rotation of the bottom of the heat dissipation blade. The centrifugal force of the cooling water is toward the side wall of the heat dissipation blade, increasing the pressure of the cooling water toward the first water outlet hole opened on the lower side of the heat dissipation blade and making it stable. The stable water pressure ensures the stable operation of the cooling mechanism. The stable coolant pressure at the first water outlet hole can provide a stable atomized water output to ensure the reliability and stability of the system. The cooling water can be consumed stably, and the consumption volume of the cooling water in the heat dissipation blade during use can be obtained. Cooling water is added regularly to avoid the cooling water being consumed and affecting the heat dissipation effect.

[0021] 2. In the synchronous rectification MOS driving circuit, under the action of the centrifugal force generated by the stirring of the supercharging plate, the cooling water enters the second water outlet through the first water outlet, and part of the dispersed cooling water is thrown out by the centrifugal force. After passing through the second water outlet, the cooling water is further dispersed and atomized by the strong airflow generated by the rotation of the heat dissipation blades. By atomizing the cooling water into small water droplets, the contact area between the cooling water and the heat-conducting heat dissipation rod is increased, so that the cooling water can better absorb heat. The atomization of the cooling water increases the surface area and can also evaporate faster, further improving the cooling effect. The atomization of the cooling water can achieve a more uniform cooling effect. The atomized cooling water can better cover the surface of the cooled object and evenly absorb the heat of the heat-conducting heat dissipation rod during the contact process. In this way, the problem of excessive temperature difference on the surface of the heat-conducting heat dissipation rod caused by uneven cooling can be avoided, and the uniformity and stability of the cooling can be improved.

[0022] 3. The synchronous rectification MOS driving circuit evenly diffuses the airflow to various places inside the heat dissipation pipe through the division of strong airflow through several heat-conducting heat dissipation rods. The atomized cooling water and the strong airflow are synchronously and evenly diffused to various places inside the heat dissipation pipe. The multi-layer shielding assembly formed by the shielding cover, the heat dissipation pipe and the heat-conducting heat dissipation rods is wrapped around the driving circuit to block the propagation of electromagnetic interference, thereby reducing the impact of interference and improving the anti-interference ability of the system. The multi-layer shielding structure provides a stronger shielding effect, effectively blocking and absorbing the fluctuation and propagation of electromagnetic radiation. Each layer of protection can further reduce the leakage of interference signals and improve the isolation performance of electromagnetic radiation, thereby protecting external equipment from interference. Multi-layer protection against electromagnetic interference leakage can reduce the impact of radiation on surrounding personnel and provide a safer working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a synchronous rectification MOS driving device of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of a synchronous rectification MOS driving device of the present invention;

[0025] Figure 3 It is a cross-sectional schematic diagram of the heat dissipation blade of the present invention;

[0026] Figure 4 It is a schematic diagram of the transmission sleeve of the present invention;

[0027] Figure 5 The structure of the present invention Figure 4 A schematic diagram of the enlarged area of ​​part A;

[0028] Figure 6 is a cross-sectional schematic diagram of the second driving gear of the present invention;

[0029] Figure 7 It is a cross-sectional schematic diagram of the gear positioning rod of the present invention;

[0030] Figure 8 It is a cross-sectional schematic diagram of the reverse driven gear of the present invention;

[0031] Fig. 9 This is a schematic diagram of the synchronous rectification MOS driving circuit of the present invention.

[0032] In the figure: 1. Control mechanism; 2. Casing; 3. Driver chip; 7. MOS tube circuit;

[0033] Shielding mechanism; 41. Shielding cover; 42. Heat dissipation pipe; 43. Heat conduction and heat dissipation rod; 44. Fan housing; 45. Motor support frame;

[0034] Atomizing mechanism; 51, driving motor; 52, driving shaft; 53, liquid upper baffle; 54, water adding piston; 55, heat dissipation blade; 56, supporting column; 57, transition plate; 58, L fixing bracket; 59, direction-changing transition gear; 510, first driving gear; 511, reverse driven gear; 512, transmission sleeve; 513, boosting rod; 514, first water outlet; 515, boosting sheet;

[0035] Cooling mechanism; 61. second driving gear; 62. reduction gear; 63. gear positioning rod; 64. support seat; 65. atomizing disk; 66. second water outlet; 67. positioning column. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention

[0038] See also Figure 1 - Fig. 9 A synchronous rectification MOS driving circuit comprises a control mechanism 1, a housing 2 is arranged outside the control mechanism 1, a driving chip 3 is arranged inside the housing 2, a MOS tube circuit 7 is arranged inside the driving chip 3, a shielding mechanism is arranged outside the driving chip 3, an atomizing mechanism is arranged inside the shielding mechanism, and a cooling mechanism is arranged in the middle of the shielding mechanism;

[0039] The shielding mechanism is used to shield the electromagnetic interference caused by the driver chip 3;

[0040] The atomizing mechanism includes a driving motor 51, the driving motor 51 is used to provide power, and the atomizing mechanism is used to atomize water;

[0041] The cooling mechanism is used to cool the driving chip 3 .

[0042] refer to Figure 2 The shielding mechanism includes a shielding cover 41 fixed to the outside of the driving chip 3, a heat dissipation pipe 42 is fixedly connected to the top of the shielding cover 41, a plurality of heat-conducting heat dissipation rods 43 are fixedly connected to the top of the shielding cover 41, a fan housing 44 is fixedly connected to the side of the heat dissipation pipe 42 away from the shielding cover 41, and a motor support frame 45 is fixedly connected to the inner side of the top of the fan housing 44.

[0043] The synchronous rectification MOS driving circuit transfers the heat absorbed by the driving chip 3 to the heat-conducting heat dissipation rod 43 through the shielding cover 41. The strong airflow is divided by a number of heat-conducting heat dissipation rods 43 to evenly diffuse the airflow to various places inside the heat dissipation pipe 42. The atomized cooling water and the strong airflow are synchronously and evenly diffused to various places inside the heat dissipation pipe 42. The shielding cover 41, the heat dissipation pipe 42 and the heat-conducting heat dissipation rod 43 form a multi-layer shielding component that wraps around the driving chip 3 to block the propagation of electromagnetic interference. The shielding cover 41, the heat dissipation pipe 42 and the heat-conducting heat dissipation rod 43 are all made of beryllium copper alloy materials with high signal shielding capabilities and high thermal conductivity, which reduces the impact of interference and improves the anti-interference ability of the system. The multi-layer shielding structure provides a stronger shielding effect, effectively blocks and absorbs the fluctuation and propagation of electromagnetic radiation, and each layer of protection can further reduce the leakage of interference signals and improve the isolation performance of electromagnetic radiation, thereby protecting external equipment from interference. Multi-layer protection against electromagnetic interference leakage can reduce the impact of radiation on surrounding personnel and provide a safer working environment.

[0044] refer to Figure 3 The atomization mechanism also includes a driving shaft 52 rotatably connected to the bottom of the driving motor 51. Two supporting columns 56 are fixedly connected to the bottom of the driving motor 51. A transition plate 57 is fixedly connected to the middle of the supporting columns 56. The driving shaft 52 does not contact the transition plate 57. The side of the driving motor 51 away from the driving shaft 52 is fixed to the motor support frame 45.

[0045] refer to Figure 3 A heat dissipation blade 55 is fixedly connected to the middle and lower part of the driving shaft 52 , a liquid upper baffle 53 is fixedly connected to the middle part of the heat dissipation blade 55 , a water adding piston 54 is movably connected to the middle part of the liquid upper baffle 53 , and the liquid upper baffle 53 rotates on the outer side of the transition plate 57 .

[0046] refer to Figure 5 The end of the support column 56 away from the driving shaft 52 is fixedly connected to an L fixed bracket 58, the middle of the driving shaft 52 is fixedly connected to a first driving gear 510, and the side of the first driving gear 510 away from the liquid upper baffle 53 is meshedly connected to a changing transition gear 59, the changing transition gear 59 rotates in the middle of the L fixed bracket 58, and the end of the changing transition gear 59 away from the first driving gear 510 is meshedly connected to a reverse driven gear 511.

[0047] refer to Figure 5 A transmission sleeve 512 is fixedly connected to the side of the reverse driven gear 511 away from the direction changing transition gear 59, a plurality of boosting rods 513 are fixedly connected to the side of one end of the transmission sleeve 512 away from the reverse driven gear 511, a boosting plate 515 is fixedly connected to the end of the boosting rod 513 away from the transmission sleeve 512, and a first water outlet hole 514 is opened on the bottom side of the heat dissipation blade 55.

[0048] The synchronous rectification MOS driving circuit drives the reverse driven gear 511 to rotate through the meshing of the first driving gear 510 to drive the reversing transition gear 59. The rotation direction of the reverse driven gear 511 is changed through the transmission of the reversing transition gear 59. The rotation direction of the reverse driven gear 511 is coaxial with and opposite to the first driving gear 510. Similarly, the transmission sleeve 512 fixed at the bottom of the reverse driven gear 511 rotates in the opposite direction to the first driving gear 510. When the transmission sleeve 512 rotates, it drives the supercharging plate 515 at the bottom of the heat dissipation blade 55 to rotate and stir the cooling water added before the work to rotate. The cooling water generates centrifugal force during the rotation process. The centrifugal force of the cooling water is toward the side wall of the heat dissipation blade 55. The pressure of the cooling water toward the first water outlet 514 opened on the lower side of the heat dissipation blade 55 is equal to the magnitude of the centrifugal force. The stable water pressure ensures the stable operation of the cooling mechanism. When the first water outlet 514 is connected and overlapped with the second water outlet 66, the coolant is thrown out by the centrifugal force, which can provide a stable atomized water output to ensure the reliability and stability of the system, and can consume cooling water stably. Similarly, the use time of the cooling water in the heat dissipation blade 55 can be obtained, and cooling water can be added regularly to avoid the cooling water being exhausted and affecting the heat dissipation effect.

[0049] refer to Figure 6 The cooling mechanism includes a second driving gear 61 fixedly connected to the bottom of the driving shaft 52, the side of the second driving gear 61 is meshedly connected with a plurality of reduction gears 62, the middle of the reduction gear 62 is rotatably connected with a gear positioning rod 63, and the bottom of the gear positioning rod 63 is fixedly connected with a support seat 64.

[0050] refer to Figure 7 One end of the gear positioning rod 63 away from the atomizing disk 65 is fixedly connected to a support seat 64 , and a positioning column 67 is fixedly connected to the bottom of the support seat 64 . The positioning column 67 rotates in the middle of the heat-conducting and heat-dissipating rod 43 .

[0051] refer to Figure 8 A second water outlet hole 66 is opened on the top side of the atomizing disk 65 , and the first water outlet hole 514 and the second water outlet hole 66 have the same aperture.

[0052] The synchronous rectification MOS driving circuit, through the deceleration of the second driving gear 61 and the reduction gear 62, the atomizing disk 65 rotates at the revolution speed of the gear positioning rod 63, the rotation speed of the atomizing disk 65 is slow, the heat dissipating blade 55 rotates at the rotation speed of the driving shaft 52, the rotation speed of the heat dissipating blade 55 is fast, when the first water outlet hole 514 on the heat dissipating blade 55 passes through the second water outlet hole 66 during the rotation of the atomizing disk 65, the cooling water is stirred by the supercharging plate 515. The cooling water is partially dispersed in the cavity in the middle of the heat dissipating blade 55 through the first water outlet hole 514 and the second water outlet hole 66, and the cooling water passes through the second water outlet hole 66. After 66, the strong airflow generated by the rotation of the heat dissipation blades 55 further breaks up the atomization. By atomizing the cooling water into small water droplets, the contact area between the cooling water and the heat-conducting heat dissipation rod 43 is increased, so that the cooling water can absorb heat better. The cooling water atomization increases the surface area and can evaporate faster, further improving the cooling effect. The atomization of the cooling water can achieve a more uniform cooling effect. The atomized cooling water can better cover the surface of the cooled object and evenly absorb the heat of the heat-conducting heat dissipation rod 43 during the contact process. In this way, the problem of excessive temperature difference on the surface of the heat-conducting heat dissipation rod 43 caused by uneven cooling can be avoided, thereby improving the uniformity and stability of cooling.

[0053] The specific working process and principle of this embodiment are as follows:

[0054] Before working, open the water adding piston 54 upwards and add cooling water to the middle of the heat dissipation blade 55. After adding cooling water, cover the water adding piston 54, start the driving motor 51, and fix the top of the driving motor 51 to the motor support frame 45. The driving shaft 52 at the bottom of the driving motor 51 rotates to output power. The top of the support column 56 is fixed to the driving motor 51 and does not move. The L fixing bracket 58 fixedly connected to the bottom of the support column 56 is also fixed and does not move. The first driving gear 510 rotates synchronously with the driving shaft 52. The first driving gear 510 drives the changing transition gear 59 on the L fixing bracket 56 through meshing. 8 rotates in the middle, the L fixing bracket 58 positions the direction-changing transition gear 59, and the gear teeth below the direction-changing transition gear 59 are meshed and drive the reverse driven gear 511 to rotate during the rotation process. The rotation direction of the reverse driven gear 511 is changed through the transmission of the direction-changing transition gear 59, and the rotation direction of the reverse driven gear 511 is coaxial with the first driving gear 510 and in the opposite direction. Similarly, the transmission sleeve 512 fixed at the bottom of the reverse driven gear 511 rotates in the opposite direction with the first driving gear 510, and the heat dissipation blade 55 fixedly connected to the middle of the driving shaft 52 rotates synchronously with the driving shaft 52. The heat dissipation blade 55 rotates During the process, a strong airflow is generated inside the heat dissipation pipe 42. The strong airflow contacts the top of the shielding cover 41 and is divided into two parts, leaving the outer side of the housing 2 from the two sides of the heat dissipation pipe 42. The heat dissipation blade 55 drives the liquid upper baffle 53 fixed in the middle of the heat dissipation blade 55 to rotate together during the rotation process. The liquid upper baffle 53 and the transition plate 57 can slide. During the rotation process of the liquid upper baffle 53, there will be no interference with the transition plate 57 and the support column 56 fixed on the transition plate 57. When the transmission sleeve 512 rotates, it drives the booster plate 515 located at the bottom of the heat dissipation blade 55 to rotate and stir the cooling water added before the work. Rotation, cooling water generates centrifugal force during the rotation process, and the centrifugal force of the cooling water is toward the side wall of the heat dissipation blade 55. The pressure of the cooling water toward the first water outlet 514 opened on the lower side of the heat dissipation blade 55 is equal to the size of the centrifugal force. The stable water pressure ensures the stable operation of the cooling mechanism. When the first water outlet 514 is connected and overlapped with the second water outlet 66, the coolant is thrown out by the centrifugal force, which can provide a stable atomized water output to ensure the reliability and stability of the system, and can consume cooling water stably. Similarly, the use time of the cooling water in the heat dissipation blade 55 can be obtained, and cooling water can be added regularly to avoid the cooling water being exhausted and affecting the heat dissipation effect.

[0055] Working process of the atomization mechanism: synchronously, the driving shaft 52 drives the second driving gear 61 fixed at the bottom of the driving shaft 52 to rotate during the rotation process, and the side of the second driving gear 61 is meshed with multiple reduction gears 62. During the rotation process of the second driving gear 61, the reduction gear 62 is driven to revolve around the second driving gear 61 as the center. The reduction gear 62 rotates around the gear positioning rod 63 as the center while revolving. The reduction gear 62 drives the second driving gear 61 to rotate as the center while revolving. The support seat 64 fixedly connected to the bottom of the gear positioning rod 63 provides support for the movement of the reduction gear 62. The support seat 64 The positioning column 67 fixedly connected at the bottom rotates in the heat-conducting heat dissipation rod 43 to form a reduction gear 62. The gear positioning rod 63 is limited to avoid deviation. The top of the gear positioning rod 63 is fixedly connected with an atomizing disk 65. The atomizing disk 65 rotates with the gear positioning rod 63. The top of the atomizing disk 65 is sleeved on the outside of the heat dissipation blade 55. A second water outlet 66 communicating with the first water outlet 514 is opened on the outside of the atomizing disk 65. The inner wall of the atomizing disk 65 seals the outer outlet of the first water outlet 514. The atomizing disk 65 decelerated by the second driving gear 61 and the reduction gear 62 rotates at the revolution speed of the gear positioning rod 63. 65 has a slow revolution speed, and the heat dissipation blades 55 rotate at the rotation speed of the drive shaft 52. The speed of the heat dissipation blades 55 is fast. When the atomizing disk 65 rotates one circle, the heat dissipation blades 55 rotate several circles. The second water outlet 66 discharges cooling water through the first water outlet 514 at different positions for many times, and cools the heat-conducting heat dissipation rod 43 in all directions. When the first water outlet 514 on the heat dissipation blades 55 passes through the second water outlet 66 during the rotation of the atomizing disk 65, the cooling water is stirred by the supercharging plate 515. The centrifugal force generated by the stirring of the supercharging plate 515 causes the cooling water to pass through the first water outlet 514 and the second water outlet 66 to eject part of the dispersed cooling water. The cooling water passes through the second water outlet 66. Afterwards, it is driven by the strong airflow generated by the rotation of the heat dissipation blades 55 and passes to the cooling mechanism. The cooling water is atomized into small water droplets, and the contact area between the cooling water and the heat-conducting heat dissipation rod 43 is increased, so that the cooling water can absorb heat better. The atomization of the cooling water increases the surface area and can also evaporate faster, further improving the cooling effect. The atomization of the cooling water can achieve a more uniform cooling effect. The atomized cooling water can better cover the surface of the cooled object and evenly absorb the heat of the heat-conducting heat dissipation rod 43 during the contact process. In this way, the problem of excessive temperature difference on the surface of the heat-conducting heat dissipation rod 43 caused by uneven cooling can be avoided, thereby improving the uniformity and stability of cooling.

[0056] The working process of the cooling mechanism: the strong airflow generated by the rotation of the heat dissipation blades 55 further disperses the atomized cooling water. The atomized cooling water passes through the heat-conducting heat dissipation rod 43 driven by the strong airflow. The bottom of the heat-conducting heat dissipation rod 43 is fixedly connected to the top of the shielding cover 41. The shielding cover 41 absorbs the heat of the driving chip 3 and transfers it to the heat-conducting heat dissipation rod 43. The strong airflow is divided by a number of heat-conducting heat dissipation rods 43 to evenly diffuse the airflow to various places inside the heat dissipation pipe 42. The atomized cooling water and the strong airflow are synchronously and evenly diffused to various places inside the heat dissipation pipe 42. The atomized cooling water contacts the top of the heat-conducting heat dissipation rod 43 and the shielding cover 41. The atomized cooling water absorbs the heat from the top of the heat-conducting heat dissipation rod 43 and the shielding cover 41, and vaporizes and takes away the heat. The heat-collecting airflow is divided into two parts and leaves the outside of the casing 2 from the two sides of the heat dissipation pipe 42, taking away a large amount of heat while preventing cooling water from entering the interior of the casing 2. The multi-layer shielding assembly formed by the shielding cover 41, the heat dissipation pipe 42 and the heat-conducting heat dissipation rod 43 wraps the driver chip 3 to block the propagation of electromagnetic interference, thereby reducing the impact of interference and improving the anti-interference ability of the system. The multi-layer shielding structure provides a stronger shielding effect, effectively blocking and absorbing the fluctuation and propagation of electromagnetic radiation. Each layer of protection can further reduce the leakage of interference signals and improve the isolation performance of electromagnetic radiation, thereby protecting external equipment from interference. Multi-layer protection against electromagnetic interference leakage can reduce the impact of radiation on surrounding personnel and provide a safer working environment.

[0057] When the synchronous rectification MOS driving circuit is driving, when the positive electrode above the transformer D1 outputs a high level, the negative electrode below the transformer D1 is a low level, the base of the MOS tube Q2 is a high level, the MOS tube Q2 is turned on, the base of the MOS tube Q1 is connected to the negative electrode of the transformer D1 and is a low level, the MOS tube Q1 is turned off, and the current charges the inductor H1 through the inductor H1, and continues to charge the capacitor C1 through the capacitor C1. The current supplies power to the load through the resistor R1 and returns to the negative electrode of the transformer D1 through the MOS tube Q2.

[0058] When the positive and negative poles of the transformer D1 change, the negative pole above the transformer D1 outputs a low level, the positive pole below the transformer D1 is a high level, the base of the MOS tube Q2 is a low level, the MOS tube Q2 is turned off, the base of the MOS tube Q1 is connected to the positive pole of the transformer D1 and is a high level, the MOS tube Q1 is turned on, and the high level below the transformer D1 returns to the negative pole through the MOS tube Q1. The inductor H1 is charged before the positive and negative poles of the transformer D1 change. After the current is cut off, the current generated by the inductor H1 charges the capacitor C1, supplies power to the load through the resistor R1, and returns to the inductor H1 through the MOS tube Q1. This circuit is a synchronous rectification MOS circuit in the driver chip 3, which converts the AC signal into a DC signal, reduces energy loss, and improves the energy conversion efficiency of the system. The AC signal is converted into a stable DC signal to provide a stable power supply for electronic equipment.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous rectification MOS drive circuit, comprising a control mechanism (1), a housing (2) disposed outside the control mechanism (1), a drive chip (3) disposed inside the housing (2), and a MOS tube circuit (7) disposed inside the drive chip (3), characterized in that: A shielding mechanism is arranged on the outside of the driving chip (3), an atomizing mechanism is arranged inside the shielding mechanism, and a cooling mechanism is arranged in the middle of the shielding mechanism; The shielding mechanism is used to shield electromagnetic interference caused by the driving chip (3); The atomization mechanism comprises a drive motor (51), the drive motor (51) is used to provide power, and the atomization mechanism is used to atomize water; The cooling mechanism is used to cool the driving chip (3); The atomization mechanism further comprises a driving shaft (52) fixedly connected to the bottom output end of the driving motor (51); two supporting columns (56) are fixedly connected to the bottom of the driving motor (51); a transition plate (57) is fixedly connected to the middle of the supporting column (56); the driving shaft (52) and the transition plate (57) are not in contact; and a side of the driving motor (51) away from the driving shaft (52) is fixed to a motor support frame (45); A heat dissipation blade (55) is fixedly connected to the middle and lower part of the driving shaft (52), a liquid upper baffle (53) is fixedly connected to the middle part of the heat dissipation blade (55), a water adding piston (54) is movably connected to the middle part of the liquid upper baffle (53), and the liquid upper baffle (53) rotates on the outer side of the transition plate (57); An end of the support column (56) away from the driving shaft (52) is fixedly connected to an L fixed bracket (58); a middle portion of the driving shaft (52) is fixedly connected to a first driving gear (510); a surface of the first driving gear (510) away from the liquid upper baffle (53) is meshingly connected to a direction-changing transition gear (59); the direction-changing transition gear (59) rotates in the middle portion of the L fixed bracket (58); an end of the direction-changing transition gear (59) away from the first driving gear (510) is meshingly connected to a reverse driven gear (511); A transmission sleeve (512) is fixedly connected to a side of the reverse driven gear (511) away from the direction-changing transition gear (59); a plurality of boosting rods (513) are fixedly connected to a side of an end of the transmission sleeve (512) away from the reverse driven gear (511); a boosting sheet (515) is fixedly connected to an end of the boosting rod (513) away from the transmission sleeve (512); and a first water outlet hole (514) is provided on a bottom side of the heat dissipation blade (55); The cooling mechanism comprises a second driving gear (61) fixedly connected to the bottom of the driving shaft (52); a plurality of reduction gears (62) are meshingly connected to the side of the second driving gear (61); a gear positioning rod (63) is rotatably connected to the middle of the reduction gear (62); and an atomizing disk (65) is fixedly connected to the top of the gear positioning rod (63).

2. A synchronous rectification MOS driving circuit according to claim 1, characterized in that: The shielding mechanism comprises a shielding cover (41) fixed to the outside of the driving chip (3), a heat dissipation pipe (42) fixedly connected to the top of the shielding cover (41), a plurality of heat-conducting heat dissipation rods (43) fixedly connected to the top of the shielding cover (41), a fan housing (44) fixedly connected to a side of the heat dissipation pipe (42) away from the shielding cover (41), and a motor support frame (45) fixedly connected to the inner side of the top of the fan housing (44).

3. A synchronous rectification MOS driving circuit according to claim 1, characterized in that: One end of the gear positioning rod (63) away from the atomizing disk (65) is fixedly connected to a support seat (64), and the bottom of the support seat (64) is fixedly connected to a positioning column (67), and the positioning column (67) rotates in the middle of the heat-conducting and heat-dissipating rod (43).

4. A synchronous rectification MOS driving circuit according to claim 1, characterized in that: A second water outlet hole (66) is provided on the top side of the atomizing disk (65); the first water outlet hole (514) and the second water outlet hole (66) have the same hole diameter.

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